One thing to keep in mind when dealing with a satellite receiver - they will NOT work if there is a generic "splitter" anywhere in the cable!
The receiver sends a DC voltage (IIRC, ~13VDC) through the cable to provide operating voltage to the LNB (doohickey on the end of the dish "arm"). A generic splitter will not let this voltage pass through properly, so you'll never get a signal.
Of course, the easiest way for the manufacturer to provide cable to multiple TVs is via a splitter - causing hate and discontent for satellite owners.
If you need to feed multiple receivers (more than 2, or if one is a DVR that needs 2 inputs), you will need a dual-LNB dish (even the cheap ones typically have this) and a multiswitch - these have both the LNB feeds on one side, and multiple outputs to the receivers (usually anywhere from 4-8 outputs).
Multiswitch example: (hey, at least they're cheap!)
Multiswitch